Credits / Closing Theme (Tracking Device)
Kelly Bailey
Klaxon Beat
Kelly Bailey
Nuclear Mission Jam (Something Secret Steers Us)
Kelly Bailey
Klaxon Beat
Valve
Tracking Device
Kelly Bailey
Hazardous Enviroments
Kelly Bailey
有一种悲伤
Zkaaai
Echoes of a Resonance Cascade
Kelly Bailey
Diabolical Adrenaline Guitar (Lambda Core)
Kelly Bailey
Vortal Combat
Kelly Bailey
Valve Theme [Long Version] (Hazardous Environments)
Kelly Bailey
CP Violation
Kelly Bailey
You're Not Supposed to Be Here
Kelly Bailey
生不如死
半条命
Vague Voices (Black Mesa Inbound)
Kelly Bailey
Adrenaline Horror
Kelly Bailey
Last Legs
Kelly Bailey
隔壁老樊-我曾 DJ版(Remix)
半条命
Triple Entanglement
Kelly Bailey
Apprehension and Evasion
Kelly Bailey
Military Precision
Kelly Bailey
写给山鬼听
半条命
Singularity
Kelly Bailey
Lab Practicum
Kelly Bailey
群星-执着（弹鼓版）（另类人 / 林柯轩 remix）
半条命, 林柯轩
Sector Sweep
Kelly Bailey
半条命
lolan
Penultimatum
Kelly Bailey
Triage at Dawn
Valve
Shadows Fore and Aft
Kelly Bailey